The 2 is in the ten million’s place
From the first two inference, it takes her phone 1 minute to charge 2% i.e 1 minute of charge = 2% of battery.
Therefore; charging from scratch,
1 min = 2%
x mins = 50%.
using cross multiplication,
x mins = (50% × 1 min) ÷ 2%.
x = 25 mins.
For 90%, applying the same formula,
y min = (90% × 1 min) ÷ 2%
y = 45 mins.
So from zero percent, it will take Dana's phone 25 minutes to charge to 50% and 45 minutes to charge to 90%.
Answer:
114
Step-by-step explanation:
Answer:
A = 52°, a = 149.2, c = 174.3
Step-by-step explanation:
Technology is useful for this. Many graphing calculators can solve triangles for you. The attachment shows a phone app that does this, too.
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The Law of Sines can give you the value of c, so you can choose the correct answer from those offered.
c = sin(C)·b/sin(B) = sin(113°)·49/sin(15°) ≈ 174.271 ≈ 174.3 . . . . . third choice
Okay so in order to find the circumference we would first need to find either the diameter or radius of the circle. The perimeter of the square is 40 and each side is equal. 40/4 = 10. So the length of one side is 10. The length of one side would be the diameter of the circle.
Diameter = 10
The only thing that is left is to find the circumference.
The formulas for circumference are:
C =
d
C = 2
r
So just multiply the diameter by pi (3.14)
10 x 3.14 = 31.4
or 10
(Which would be the answer to your problem)